Improvement in elastic fabrics for suspenders



W. LAPWORTH. Elastic Fabric for Suspenders, 850..

No; 196,980. Patented Nov. 13,1877.

'ml'qesses.

N. FEI'ERS. PHOTO-LITHOGRAPHER, WAS filNGTON, D C.

TTO all whom it ma l concern: r Be it known that 1, WILLIAM LAPWORTH,

twill the fewer the ties on the WILLIAM LAPWORTH, OF CHELSEA,MASSACHUSETTS.-

IMPROVEMENT IN ELASTIC FABRICS FOR SUSPENQERS, 80b

Specification forming part of Letters Pat of Chelsea, in the county ofSuffolk and State of Massachusetts, have invented Improve s, of whichthe followments inElastic Fabric ingis a specification:

This invention relates to improvementsin narrow and other fabrics havingelastic or .cord warps at intervals, and used chiefly for suspender andboot webbing, garters, 85c.

Suspender and garter and boot webbing,

as now commonlymade, is of two classes-first,

web-twilled on its right and plain-woven on its wrong side, and, second,plain-woven on both sides.- W'ebs of the first class are used in themanufacture up of all first-quality .suspender, boot, and garter webs,the twill en .abling the fabric to be woven thicker and stronger than.if woven plain. The longer the V t rubber warp, and the shorter thetwill the wider the fabric,

.the same number and size of warps being employed. i

In weaving ordinary Suspender-web of the' first class eightharness-frames areemploy'ed four for' the front of the fabric, two forthe back, (thetwo back frames each threads ineach heddle-eye, to balancethe face,) one for the india-rubber warps, and one for the.binderwarps-and eight crossingsof the shuttle, in eight differentsheds, are re-f quired to tie the rubber warps, or, in other words, therubberwarps are completely bound only at every eighth pick, that numberof picks being necessaryto form the twill and complete the pattern.

In a web of this class, twilled fa back, one and three-eighths inch inwidth, two hundred and fifty-seven warp-threads are required-via, forthe face and edge, onehun- I dred and one threads for the back,seventyds l twenty one; and body-threads, nineteen III:

six; for the binders, forty; rubber threa number, the latter extendingthroughall the heddle eye s in which the rubber warps are carried,except the two outside eyes. These body-threads are, in the weaving,bound against the rubber warps by the weft-threads, and, bytheirfriction against the rubber warps, act greatly to prevent the rubberfrom shirring the fabric when released from the tension to which it issubjected when being woven. Were it not for these body-threads lyingparcarrying two ent, N0.196,980, dated November 13, 1877; applicationfiled v January 31,1877. i .i

allel andin contactwith the rubber warps,

the latter could not be held withsufficient firmness in this class offabric, wherein the rubber warps are bound only at each eighth pick. i

In my invention I produce a fabric twilled on both itsfront and back,thereby makinga fabric both sides of which, like threads being employed,will present a like appearance. p

In my improved fabric the rubber warps are bound at every sixth pick,and being bound more frequently, I am enabled to dispense with thebody-threads commonly used in the heddle-eyes with the rubber warps, andalso to produce a wider fabric with a less number of warp-threads thanthough the [twill were longer.

To make a web one and three-eighths inch in width by my method, and withthreads .of

corresponding size, as above described, andin the same reed, I. employbut eight harnessframes-three for the face, three for the back,

one for the binders, and .one for the rubber threads-and I open andclose the shed, complete the pattern of the twill, and completely bindor tie the rubber warps. at every sixth crossing of the weftthread. Bybinding the warps ofte'ner I am enabled, as before stated, to dispensewith the nineteen body-threads, and

I also dispense with one set of face and back threads, for,as the twillis-shorter, and the warp is bound more frequently, the mnnber ofwarp-threads may be, lessened without decreasing the width of thecompleted fabric.

In the manufacture of a one and three- I V eighthsj inch. web, Iemployonly one hundred cc and plain and ninety-one threads-viz., face.and edge, seventy-nine; back, fifty-four; binders, thirty- .eight; andrubber, twenty. Of these binderthreads two are employed with each rubberwarp in the body of the fabric; but with the rubber warps at the edge Ineed employ but one binder, because of the passage of the weftthreadabout the edges. Oftheseventy-nine face and edge threads, as abovestated, fiftyfour are used in connection with the eighteen rubber warpsforming the body of the fabric three for each; and twenty-five threadsare used for the edges of the fabric-twelve for one edge, and'thirteenfor the other. This extra thread at one edge is commonly em ployed inwebbing at that edge from which the shuttle is thrown with most force.The one

